1 /* 2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls. 3 * 4 * Copyright (C) 2001 IBM 5 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 6 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) 7 * 8 * These routines maintain argument size conversion between 32bit and 64bit 9 * environment. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/sched.h> 19 #include <linux/fs.h> 20 #include <linux/mm.h> 21 #include <linux/file.h> 22 #include <linux/signal.h> 23 #include <linux/resource.h> 24 #include <linux/times.h> 25 #include <linux/smp.h> 26 #include <linux/sem.h> 27 #include <linux/msg.h> 28 #include <linux/shm.h> 29 #include <linux/poll.h> 30 #include <linux/personality.h> 31 #include <linux/stat.h> 32 #include <linux/mman.h> 33 #include <linux/in.h> 34 #include <linux/syscalls.h> 35 #include <linux/unistd.h> 36 #include <linux/sysctl.h> 37 #include <linux/binfmts.h> 38 #include <linux/security.h> 39 #include <linux/compat.h> 40 #include <linux/ptrace.h> 41 #include <linux/elf.h> 42 #include <linux/ipc.h> 43 #include <linux/slab.h> 44 45 #include <asm/ptrace.h> 46 #include <asm/types.h> 47 #include <linux/uaccess.h> 48 #include <asm/unistd.h> 49 #include <asm/time.h> 50 #include <asm/mmu_context.h> 51 #include <asm/ppc-pci.h> 52 #include <asm/syscalls.h> 53 #include <asm/switch_to.h> 54 55 unsigned long compat_sys_mmap2(unsigned long addr, size_t len, 56 unsigned long prot, unsigned long flags, 57 unsigned long fd, unsigned long pgoff) 58 { 59 /* This should remain 12 even if PAGE_SIZE changes */ 60 return sys_mmap(addr, len, prot, flags, fd, pgoff << 12); 61 } 62 63 /* 64 * long long munging: 65 * The 32 bit ABI passes long longs in an odd even register pair. 66 */ 67 68 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count, 69 u32 reg6, u32 poshi, u32 poslo) 70 { 71 return ksys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); 72 } 73 74 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count, 75 u32 reg6, u32 poshi, u32 poslo) 76 { 77 return ksys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); 78 } 79 80 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count) 81 { 82 return ksys_readahead(fd, ((loff_t)offhi << 32) | offlo, count); 83 } 84 85 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4, 86 unsigned long high, unsigned long low) 87 { 88 return ksys_truncate(path, (high << 32) | low); 89 } 90 91 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 92 u32 lenhi, u32 lenlo) 93 { 94 return ksys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 95 ((loff_t)lenhi << 32) | lenlo); 96 } 97 98 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high, 99 unsigned long low) 100 { 101 return ksys_ftruncate(fd, (high << 32) | low); 102 } 103 104 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low, 105 size_t len, int advice) 106 { 107 return ksys_fadvise64_64(fd, (u64)offset_high << 32 | offset_low, len, 108 advice); 109 } 110 111 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags, 112 unsigned offset_hi, unsigned offset_lo, 113 unsigned nbytes_hi, unsigned nbytes_lo) 114 { 115 loff_t offset = ((loff_t)offset_hi << 32) | offset_lo; 116 loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo; 117 118 return ksys_sync_file_range(fd, offset, nbytes, flags); 119 } 120